# Black hole finder vs Einstein's Elevator

The clearest difference is price: Black hole finder at Free against Einstein's Elevator's $1.99. On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Black hole finder is free to download; Einstein's Elevator costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Black hole finder | Einstein's Elevator |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[4.1 (7 ratings)](https://appshunter.io/ios/app/black-hole-finder/id6446029571/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 62.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 days | — |
| Monetization | Free | — |
| Size | 81 MB | 41 MB |
| Requires iOS | **13.0** | 13.2 |
| Devices | **iPhone, iPad, iPod** | iPad, Apple TV |
| Age rating | 4+ | 4+ |
| Developer | [DDQ](https://appshunter.io/developer/418328467) | [Ventura Educational Systems](https://appshunter.io/developer/371324172) |

## What reviewers say

### Black hole finder

[App page](https://appshunter.io/ios/app/black-hole-finder/id6446029571)

Contribute to cutting-edge astronomical research by identifying potential black holes and rare elements. Sift through real-time telescope images to detect fleeting light signals from cosmic events and potentially earn co-authorship on scientific publications.

**Highlights:** Analyze real-time telescope images, Detect light signals from cosmic events, Contribute to scientific research, Potential co-authorship on publications, Learn about black holes and neutron star mergers, Direct telescopes for additional measurements

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Einstein's Elevator

[App page](https://appshunter.io/ios/app/einsteins-elevator/id6648794228)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Black hole finder free?

Black hole finder is free to download, with no in-app purchases.

### Is Einstein's Elevator free?

Einstein's Elevator costs $1.99, with no in-app purchases.

### Do Black hole finder or Einstein's Elevator have ads?

Neither Black hole finder nor Einstein's Elevator shows ads.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*